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Finding the Fourth Proportional to 18,950.26, 28,428.90 and 6,469.60

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Solution

The fourth proportional to 18,950.26, 28,428.90 and 6,469.60 is: 9,705.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,950.26 : 28,428.90 = 6,469.60 : x
  2. Step 2: Convert to fraction form
    18,950.26/28,428.90 = 6,469.60/x
  3. Step 3: Cross multiply
    18,950.26x = 28,428.90 × 6,469.60
  4. Step 4: Simplify right side
    18,950.26x = 183,923,611.44
  5. Step 5: Solve for x
    x = 183,923,611.44/18,950.26
  6. Step 6: Final answer
    x = 9,705.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.